The sensor is S1 in this alarm that we found in a Radio Electronics magazine from May 1971. Several sensors can be used in series. The SCR supports equivalents from the 106 series.
This power supply was obtained from an Electronic Design from the 90's. The circuit applies to...
This is a 6-bit counter, ideal for digital electronics classes or as a electronics teaching...
This circuit is from a 1980s Signetics documentation. The circuit separates the modulation signal from a...